Ibn Bassal () was an 11th-century Andalusian Arab botanist and agronomist in Toledo and Seville, Spain who wrote about horticulture and arboriculture. He is best known for his book on agronomy, the Dīwān al-filāha (An Anthology of Husbandry). Life and work Ibn Bassal worked at the Abbasid court of Al-Mutamid, for whom he created the Hā’īṭ al-Sulṭān botanical garden in Seville. Originally from Toledo, Ibn Bassal moved to Seville after Alfonso VI conquered Toledo in 1085. He travelled (on pilgrimage) to the Hejaz, visiting Egypt, Sicily, Syria and seemingly also countries from Abyssinia and Yemen to Iraq, Persia and India. He returned with knowledge of the cultivation of cotton, and he may well have brought seeds and plants with him for the Toledo botanical garden. His book 'Kitāb al-Kasd wa 'l-bayān is primarily about horticulture. He is best known for his book on agronomy, the Dīwān al-filāha. He also wrote the treatise The Classification of Soils, which divided soil fertility into ten classifications. The Dīwān al-filāha Ibn Bassal's magnum opus, his treatise on agronomy entitled Dīwān al-filāḥa (An Anthology of Husbandry), was originally a copious manuscript that had been dedicated to his botanical garden of Al-Ma’mūn at Toledo. His seminal work was subsequently abridged, during the author's lifetime, and made into a single volume, styled Kitāb al-qaṣd wa’l-bayān (The Book of Concision and Clarity). Although it had originally been compiled in Arabic, the work was later translated into Castilian in the 13th century, and many years later into Spanish. Ibn Bassal's practical and systematic book Dīwān al-filāha lacks references to other agronomists, and appears to be a record of his own experience. In the book, he describes over 180 cultivated plants, including chickpeas, beans, rice, peas, flax, henbane, sesame, cotton, safflower, saffron, poppies, henna, artichoke; herbs and spices including cumin, caraway, fennel, anise, and coriander; vegetables requiring irrigation or plentiful watering such as cucumbers, melons, mandrake, watermelons, pumpkins and squash, eggplant, asparagus, caper, and colocynth; the root vegetables carrots, radish, garlic, onion, leek, parsnip, the Sudanese pepper, and the dye-yielding madder; leaf vegetables including cabbage, cauliflower, spinach, purslane, amaranth and chard. He also covers arboriculture, detailing the propagation of the palm, olive, pomegranate, quince, apple, fig, pear, cherry, apricot, plum, peach, almond, walnut, hazelnut, grape, citron, orange, pistachio, pine, cypress, chestnut, holm-oak, deciduous oak, tree of paradise, arbutus, elm and ash. He describes manure with straw or sweeping mixed in